SERVICE PROCEDURE PDV24-II

Pressure Switch Testing

DANGER

120 volt exposure. To avoid personal injury, use caution while performing this procedure.

CAUTION

Be Careful When Making Voltage

Measurements or Jumping Terminals Not to Damage or Deform Connectors or Connector Pins.

Condition: Blower does not operate, burners not lit. Display shows error code “29” (Pressure Switch Failed to Close ).

With a voltmeter, check to make sure the “line in” connection to the control board has 110-120 volts. Make sure the secondary plug from the transformer to the board has 24 volts at the yellow and blue wire pin terminals (see photos to right).

Make sure the water heater control display shows “Heating” in the status window. Raise the setpoint if needed. If there is no call for heat and the setpoint is well above the tank temperature, refer to the thermostat troubleshooting and replacement section.

If the water heater control display shows “Heating” and the blower is off, Error code 29, then check the voltage output at the blower plug on the board. Should read 110-120 volts between the black and white wires to the blower (terminals 5 and 3 on the inducer output on the control board, see illustration to the right).

If there is voltage between the black and white wires to the blower plug on the board, then check the voltage at the blower connection on the blower (see photo at right). If no voltage is present, replace the wire harness. If there is 110- 120 volts, replace the blower.

Checking line voltage to board. Pins to black and white wires.

Checking secondary

voltage from transformer. Pins to blue and yellow wires.

Condition: Blower does not operate, burners not lit. Display shows error code “2” (Pressure Switch Failed to Open - Stuck Closed).

Disconnect power and remove the pressure switch cover (previous photo-PDV models). Disconnect wires on the pressure switch. Measure continuity on the pressure switch terminals with an ohmeter. If there is continuity, the pressure switch is stuck closed. Make sure pressure switch has not been bypassed (jumpered). The control will not operate with a jumpered pressure switch.

If pressure switch contacts are stuck closed, check the pressure switch tubing for condensate, dirt, or kinks. If the tubing is O.K., replace the pressure switch with the same setting.

Checking line voltage at the

blower wire harness connection

on blower.

Reconnect power. Verify

proper operation.If there is no voltage on the control board to the blower plug and the control display shows “Heating”, then

replace the control board.

29

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Bradford-White Corp PDV100S200, D80T725, D65T625, PDV100S150, PDV100S250, PDV100T360, PDV80S250 Service Procedure PDV24-II
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PDV80T300, PDV100S150, PDV100T360, PDV80S150, D65T625 specifications

Bradford-White Corporation is renowned for its quality water heating solutions, with a diverse range of products designed to meet various residential and commercial needs. Among their stellar offerings are the D80T725, PDV100S200, PDV100S250, PDV80S250, and PDV802200 models, each equipped with advanced technologies and features that set them apart in the market.

The D80T725 is an innovative 80-gallon water heater that employs a powerful 75,000 BTU burner, ensuring rapid water heating for larger households. One of its key features is the Defender Safety System, which provides exceptional protection against potential hazards. The advanced electronic control system enhances efficiency and reliability, making it an ideal choice for energy-conscious consumers. Additionally, the tank's unique insulation helps maintain water temperature longer, reducing energy costs.

Moving to the PDV series, the PDV100S200 and PDV100S250 are dynamic, direct vent gas water heaters with capacities of 100 gallons and impressive BTU inputs. These models utilize a proper venting system that draws air from outside, ensuring that indoor air quality remains uncompromised. Both models feature Bradford-White's patented hydrojet total performance system, improving heat transfer by minimizing sediment buildup. This technology prolongs the lifespan of the unit while maximizing energy efficiency.

The PDV80S250, like its PDV counterparts, also utilizes direct venting technology for enhanced safety and efficiency. With an 80-gallon capacity and a robust 250,000 BTU input, this model is designed for businesses and larger households requiring significant hot water availability. The use of cutting-edge insulation technology in these models reduces standby heat loss, which translates to substantial savings on energy bills.

Lastly, the PDV802200 stands out with similar advanced features but offers a higher capacity of 80 gallons, making it a perfect solution for commercial applications. It strikes a balance between performance and reliability, ensuring consistent hot water delivery even during peak demand. The integration of robust safety features and user-friendly controls make it easy for facility managers to operate and maintain.

In summary, whether you opt for the D80T725 or one of the PDV models, you can expect a blend of performance, efficiency, and advanced technology. Bradford-White's commitment to quality and innovation ensures that each product meets the demands of modern consumers, making them a leading choice in the water heating industry.
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